When a goblin is in front of you and it picks its left nostril with its right little fingernail, that is a sign of dislike
When a goblin is in front of you and it picks its left nostril with its left little fingernail, that is a sign of friendship
When a goblin is in front of you and it picks its left nostril with its left index finger, that is a sign of hatred
When a goblin is in front of you and it picks its left nostril with its right index finger, that is a sign of lust
When a goblin is in front of you and it picks its right nostril at any time, that is a sign of hunger
When a goblin is in front of you and it picks its bum, It sees a version of your future.
This sign language has been going on for centuries with no knowledge or understanding from the outside world. The picking gestures are also how government politics are usually worked out as well.